Question

If o sin(90 - θ)cosθ= 1 and, θ is an acute angle then θ is:

(a) 90°
(b) 60°
(c) 30°
(d) None of these

answer correctly
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Answer 1

Answer:

(d)

Step-by-step explanation:

sin (90-thita) cos thita =1

costhita .costhita=1

cos sq thita=1

thita=0

cos90=1 so cos sq thita is also =1

Answer 2

Step-by-step explanation:

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