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MCQ - TNPSC JTO

JTO - 540 - Trade - Workshop Calculation Science

540 UNIT 09 Algebra and Trigonometry

177)   

 What is the angle whose cosine is 0.5? 

A.
B.
C.
D.
178)   

 In triangle ABC, angle A = 30°, angle B = 90°. Then angle C = ?

A.
B.
C.
D.
179)   

 sin θ = 4/5. Then cos θ = ?

A.
B.
C.
D.
180)   

 A vertical pole of height 15 m casts a shadow 15√3 m long. Sun’s angle = ?

A.
B.
C.
D.
181)   

 sin θ = opposite/hypotenuse is true in:

A.
B.
C.
D.
182)   

 A pole 20 m high casts a shadow 20 m long. Find tan θ.

A.
B.
C.
D.
183)   

 A tower is 100 m high. From a point on the ground, angle of elevation is 60°. Distance to the tower = ?

A.
B.
C.
D.
184)   

 If cos θ = 4/5, then sin θ = ?

A.
B.
C.
D.
185)   

 The angle of depression is equal to:

A.
B.
C.
D.
186)   

 If sin θ = 5/13 and θ is acute, then cos θ = ?

A.
B.
C.
D.
187)   

 A ladder makes 60° angle with the ground and reaches 10 m up a wall. Ladder length = ? 

A.
B.
C.
D.
188)   

Find height when distance = 50 m and angle of elevation = 30°

A.
B.
C.
D.
189)   

In triangle ABC, right-angled at B, if angle A = 60°, then angle C = ?

A.
B.
C.
D.
190)   

 If tan θ = 3/4, find sin θ.

A.
B.
C.
D.
191)   

 Trigonometric ratios are defined for:

A.
B.
C.
D.
192)   

 sin²A + cos²A = ? 

A.
B.
C.
D.