$$ {Cos^4θ +Sin^4θ}={2 \over3} $$ then the value of $$ {Cos^2θ -Sin^2θ+1}$$?
5 2626 5e5cac92ceeecd2b761887bd
Q:
$$ {Cos^4θ +Sin^4θ}={2 \over3} $$ then the value of $$ {Cos^2θ -Sin^2θ+1}$$?
- 1$$ {13 \over15} $$false
- 2$$ {14\over15} $$false
- 3$$ {15 \over14} $$false
- 4$$ {15 \over13} $$true
- Show Answer
- Workspace
- Discuss