Question

CosM=sinM
cosM=cosN
cosM=tanN
SinM=cosM
tanM=tanN

Answer 1

Due to the fact that M, according to the original equation, must equal π/4, N would have to equal the same according the next one. Though, everything falls apart on cosM=tanN. Because cos(π/4)≠tan(π/4). Though, everything works out for the rest.