What is 2×(-5)-(-8)=A. 79B.-80C.80D.83what is the answer?
1 answer:
You might be interested in
Step-by-step explanation:
first of all
put above of equation
(sin/cos)(sin)+cos =sec
sin²/cos +cos=sec
take l.c.m
sin²+cos²/cos=sec
as sin ²+cos²=1 so
1/cos=sec
sec=sec
hence proved