Question

seco + tan 0
25 If 0 is an acute angle and sin 8 = cos o, find the value of
2 tan2 0 + sin2.0 - 1.
26 Prove the following:​

Answer 1

Step-by-step explanation:

sinθ=cosθ

cosθsinθ=cosθcosθ

tanθ=1=tan45o

θ=45o

Therefore, 2tanθ+sin2θ−1=2tan45o+sin245o−1

=2×(1)2+(21)2−1=2+21−1=23.