Question

if 7# and 2# are acute angle and 7# = cos 2# then find the value of 2 sin 3# ° - ✓3 tan 3# .
# - thita​

Answer 1

Answer:

Correct answer:- 0

Step-by-step explanation:

sin7θ=cos2θ

∴sin7θ=sin(90∘−2θ)

⇒7θ=90∘−2θ

⇒7θ+2θ=90∘

⇒9θ=90∘

⇒θ=10∘

Now,2sin3θ−3tan3θ=2sin3×10∘−3tan310∘

=2sin30∘−3tan30∘

=2×21−3×31=1−1=0